package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetMealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetMealService setMealService;

    //根据id删除分类,删除之前要判断分类是否关联菜品
    @Override
    public void remove(Long id) {

        //查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper=new LambdaQueryWrapper<>();
        //添加条件查询，根据id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1=dishService.count(dishLambdaQueryWrapper);

        if(count1>0){
            //已经关联菜品，抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }


        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setMealLambdaQueryWrapper=new LambdaQueryWrapper<>();
        //添加条件查询，根据id进行查询
        setMealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2=setMealService.count(setMealLambdaQueryWrapper);
        if(count2>0){
            //已经关联套餐，抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }


        //正常删除分类
        super.removeById(id);
    }
}
